just bought this game it runs fine but has no voice when people talk the music in background is fine

What sound card do you have?
Is your computer a particular model or is it custom built?
If you have a particular model (for example, Dell Dimension 5100 or HP Pavilion p6600z) let us know what it is so we can look up its specs and find out if it meets the requirements for the game.

its vista and dell inspiron 530,got every game of art of murder and all work fine

This is a Hidden Object Game - does it have voiceovers?

Edit -

City Interactive lists the game as an Upcoming Title, where was the game purchased?

Oops. I was confusing it with Secret Files: Tunguska and Secret Files 2: Puritas Cordis.

But if it's ***this hidden object game***, it may very well not have voices. If it's just been released, someone in the Casual forum may know if it's voiced or not.